<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
</head>
<body>
    <div id="app">
        <!-- v-model 双向数据绑定指令 -->
        <input type="text"  v-model='msg' >
        <div>{{msg}}</div>
    </div>
    <script>

        let vm=new Vue({
            el:'#app',
            data:{
                msg:'hello vue xxx'
            }
        })
    </script>
</body>
</html>